设计模式之桥接模式

1.功能

分离抽象和实现

 

2.优点

(1)使得抽象和实现可以独立扩展

(2)降低抽象与实现之间的耦合度

 

类图

 

代码实现

#include <iostream>
using namespace std;

//实现类 
class AbstractionImpl{
	public:
		virtual void operation()=0;
		virtual~ AbstractionImpl(){
			cout<<"这是AbstractionImpl的析构函数..."<<endl; 
		}
};


//实现类A 
class ImplA:public AbstractionImpl{
	public:
		void operation(){
			cout<<"ImplA的operation..."<<endl; 
		}
		
		~ImplA(){
			cout<<"这是ImplA的析构函数..."<<endl; 
		}
};


//实现类B 
class ImplB:public AbstractionImpl{
	public:
		void operation(){
			cout<<"ImplB的operation..."<<endl; 
		}
		
		~ImplB(){
			cout<<"这是ImplB的析构函数..."<<endl; 
		}
};



//抽象类 
class Abstraction{
	private :
		AbstractionImpl *pImpl;
	public:
		Abstraction(AbstractionImpl *t){
			pImpl=t;
		} 
		
		virtual void operation(){
			pImpl->operation();
		}
		
		virtual ~Abstraction(){
			delete pImpl;
			cout<<"这是Abstraction的析构函数..."<<endl; 
		}
		
}; 




//抽象类A
class AbstractionA:public Abstraction{

	public:
		AbstractionA(AbstractionImpl *t):Abstraction(t){
		} 
		
		void operation(){
		
		}
}; 


//抽象类B
class AbstractionB:public Abstraction{

	public:
		AbstractionB(AbstractionImpl *t):Abstraction(t){
		} 
		
		void operation(){
			
		}
}; 

int main(void){
	AbstractionImpl *pImplA=new ImplA();
	Abstraction *pA=new AbstractionA(pImplA);
	pA->operation();
	delete pA;
}